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Are you certain that you used the correct form of silicone? The newer GE silicones (Silicone II and up) likely won't work properly with this technique, due to the fact that it's a neutral cure silicone instead of an acid cure. Very different chemistry.What's the difference between GE Silicone I* caulk and GE Silicone II* caulk?GE Silicone II* caulk is what's called a "neutral cure" silicone, which means no acids are released during the curing process (as there are in GE Silicone I*). This enables GE Silicone II* to adhere to a broader range of substrates such as plastics, concrete, and metals. Also, the odor of a neutral cure silicone such as GE Silicone II* is much less offensive than an acid or acetoxy cure silicone such as GE Silicone I*.
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